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1//#test return 151
2
3/* example tree from http://en.wikipedia.org/wiki/Huffman_coding */
4
5int getbyte(int byte)
6{
7 if (byte == 0) return 106;
8 if (byte == 1) return 139;
9 if (byte == 2) return 120;
10 if (byte == 3) return 183;
11 if (byte == 4) return 69;
12 if (byte == 5) return 197;
13 if (byte == 6) return 147;
14 if (byte == 7) return 207;
15 if (byte == 8) return 35;
16 if (byte == 9) return 155;
17 if (byte == 10) return 122;
18 if (byte == 11) return 244;
19 if (byte == 12) return 125;
20 if (byte == 13) return 215;
21 if (byte == 14) return 69;
22 if (byte == 15) return 219;
23 if (byte == 16) return 2;
24 if (byte == 17) return 224;
25 puts("FAIL [abort]: request for byte #");
26 puthex(byte);
27 while(1);
28 return 0;
29}
30
31int getbit(int bp)
32{
33 int byte;
34 byte = getbyte(bp/8);
35 return (byte >> (7 - (bp % 8))) & 1;
36}
37
38int h(int bitpos)
39{
40 if (getbit(bitpos))
41 return h1(bitpos+1);
42 else
43 return h0(bitpos+1);
44}
45
46int h0(int bitpos)
47{
48 if (getbit(bitpos))
49 return h01(bitpos+1);
50 else
51 return h00(bitpos+1);
52}
53
54int h00(int bitpos)
55{
56 if (getbit(bitpos))
57 return h001(bitpos+1);
58 else
59 return 69+h(bitpos+1);
60}
61
62int h001(int bitpos)
63{
64 if (getbit(bitpos))
65 return h0011(bitpos+1);
66 else
67 return 78+h(bitpos+1);
68}
69
70int h0011(int bitpos)
71{
72 if (getbit(bitpos))
73 return 79+h(bitpos+1);
74 else
75 return 85+h(bitpos+1);
76}
77
78int h01(int bitpos)
79{
80 if (getbit(bitpos))
81 return h011(bitpos+1);
82 else
83 return 65+h(bitpos+1);
84}
85
86int h011(int bitpos)
87{
88 if (getbit(bitpos))
89 return 77+h(bitpos+1);
90 else
91 return 84+h(bitpos+1);
92}
93
94int h1(bitpos)
95{
96 if (getbit(bitpos))
97 return h11(bitpos+1);
98 else
99 return h10(bitpos+1);
100}
101
102int h10(bitpos)
103{
104 if (getbit(bitpos))
105 return h101(bitpos+1);
106 else
107 return h100(bitpos+1);
108}
109
110int h100(bitpos)
111{
112 if (getbit(bitpos))
113 return h1001(bitpos+1);
114 else
115 return 73+h(bitpos+1);
116}
117
118int h1001(bitpos)
119{
120 if (getbit(bitpos))
121 return 80+h(bitpos+1);
122 else
123 return 88+h(bitpos+1);
124}
125
126int h101(bitpos)
127{
128 if (getbit(bitpos))
129 return h1011(bitpos+1);
130 else
131 return 72+h(bitpos+1);
132}
133
134int h1011(bitpos)
135{
136 if (getbit(bitpos))
137 return -2169;
138 else
139 return 83+h(bitpos+1);
140}
141
142int h11(bitpos)
143{
144 if (getbit(bitpos))
145 return 32+h(bitpos+1);
146 else
147 return h110(bitpos+1);
148}
149
150int h110(bitpos)
151{
152 if (getbit(bitpos))
153 return 70+h(bitpos+1);
154 else
155 return h1100(bitpos+1);
156}
157
158int h1100(bitpos)
159{
160 if (getbit(bitpos))
161 return 76+h(bitpos+1);
162 else
163 return 82+h(bitpos+1);
164}
165
166void j4cbo()
167{
168 int x;
169 if ((x = h(0)) != 151) {
170 puthex(x);
171 puts(" -> FAIL\n");
172 } else
173 puts("PASS\n");
174}
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